Surgery – Truss – Pad
Patent
1995-08-07
1997-02-18
Smith, Ruth S.
Surgery
Truss
Pad
128708, 128901, A61B 505
Patent
active
056033214
ABSTRACT:
A measured magnetocardiography signal has a relatively small heart signal mixed with a large noise signal. To produce a heart signal having a reduced noise content, the times of occurrence of a time-series of isoelectric intervals of the measured signal is first determined and a time-series isoelectric artifact curve is formed from the measurements made at those times of occurrence. A time-series non-isoelectric artifact curve for other times is determined from this information. The time-series isoelectric and nonisoelectric artifact curve is subtracted from the measured magnetocardiography time-series signal to yield a time-series heart amplitude signal having reduced noise and undistorted form.
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Stephan Achenbach et al., "Elimination of Electronic Offset and Physiological Background Activity in Magnetocardiographic Localization," Biomedizinische Technik, Band 35 Erganzungsband (1990) pp. 160-161.
Plumb et al "A Noise Suppressor for Neurophysiological Recording of Impulse Activity", IEEE Transactions on Biomedical Engineering, vol. 11, No. 4, pp 157-159, 1964.
Haupt Christopher
Kynor David B.
Wilson Steven
Biomagnetic Technologies, Inc.
Garmong Gregory
Smith Ruth S.
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